OUCH: A divorce battle may cost "Real Housewife" Sonja Morgan her East Side town house (above).NY Post: Chad Rachman

Forget catty co-stars — this “Real Housewife of New York City” says she’s getting screwed by her wealthy ex-husband.

Sonja Morgan — the saucy blond socialite who spices up the Bravo network’s Big Apple franchise — told The Post that her life has been “in limbo” because of her lingering, “bitter” Connecticut divorce case with her millionaire 80-year-old ex, John Adams Morgan, who she at least partly blames for her bankruptcy woes.

“I’m sure the world thinks, ‘Sonja doesn’t have to worry, she’s got that husband there for her.’ But I’m on my own,” said Morgan, 47.

Morgan reveals in court papers that Adams Morgan, a descendant of famed financier J.P. Morgan and former US President John Adams, is refusing to pay her a $3 million lump-sum divorce judgment along with $300,000 in back alimony.

Morgan also claims in the papers — detailed here for the first time — that while her ex lives on his private, $19 million island off Stamford, Conn., he has effectively barred her from selling or even visiting luxurious properties she co-owns with him in Colorado and France.

Morgan says the mess may force her to sell her $6 million Upper East Side town house.

She was forced to seek Chapter 11 protection in New York federal bankruptcy court last fall.

Adams Morgan’s lawyer, Norman Roberts, said his client is appealing the judgment because he believes the judge made him pay more than he agreed to in pre- and postnuptial agreements.